[webkitcorepy] Provide default argument for Environment

https://bugs.webkit.org/show_bug.cgi?id=245759
<rdar://100482618>

Reviewed by Dewei Zhu.

* Tools/Scripts/libraries/webkitcorepy/setup.py: Bump version.
* Tools/Scripts/libraries/webkitcorepy/webkitcorepy/__init__.py: Ditto.
* Tools/Scripts/libraries/webkitcorepy/webkitcorepy/environment.py:
(Environment.get): Allow for a default argument.

Canonical link: https://commits.webkit.org/254954@main

Tools/Scripts/libraries/webkitcorepy/setup.py

@@ -30,7 +30,7 @@ def readme():
 
 setup(
     name='webkitcorepy',
-    version='0.13.14',
+    version='0.13.15',
     description='Library containing various Python support classes and functions.',
     long_description=readme(),
     classifiers=[

Tools/Scripts/libraries/webkitcorepy/webkitcorepy/__init__.py

@@ -44,7 +44,7 @@
 from webkitcorepy.editor import Editor
 from webkitcorepy.file_lock import FileLock
 
-version = Version(0, 13, 14)
+version = Version(0, 13, 15)
 
 from webkitcorepy.autoinstall import Package, AutoInstall
 if sys.version_info > (3, 0):

Tools/Scripts/libraries/webkitcorepy/webkitcorepy/environment.py

@@ -52,10 +52,10 @@ def load(self, *prefixes):
                 self._mapping[key] = fl.read().rstrip('\n')
         return self
 
-    def get(self, key):
+    def get(self, key, value=None):
         if key in os.environ:
-            return os.environ[key]
-        return self._mapping.get(key)
+            return os.environ.get(key, value)
+        return self._mapping.get(key, value)
 
     def secure(self, *extra_paths):
         '''Delete unused environment files in self.path along with the provided extra paths'''